The Thames Coastguard has confirmed that a ferry carrying 489 passengers struck a quay in Harwich, Essex and started taking on water.
The Sirena Seaways ferry hit the quay at Parkeston, but the water was "quickly stopped".
Engineers are currently in discussion with the master of the ferry as to how they can tow the vessel into the harbour.
There are no reported injuries and no reported pollution, Thames Coastguard said.
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